Tecmate OptiMATE LED O-120, Vehicle charge system tester with 6-LED emergency 12V flashlight, SAE, weatherproof. Confirm if vehicle charging system is working or battery is charged & provide emergency roadside light, powered via your permanent battery lead or an an optional BIKE / AUTO socket accessory! GREEN LED indicates: vehicle charge voltage is 14V or higher; RED LED indicates: battery voltage is less than 12.3V. 6 bright LEDs provide bright light to fix a flat tire or light up hard to see places. Model O-120 specs: L= 40 / 100cm; 20 AWG cable Industry standard SAE 2-pin connector; Premium LED product designed by TecMate. 3-year limited warranty.